隐式转换注意隐式参数顺序问题

gistfile1.txt

package ch21

class PreferredPrompt(val preference: String)
object JoesPrefs {
		implicit val prompt = new PreferredPrompt("Yes, master> ")
}
object Greeter {
	
	def greet(name: String)(implicit prompt: PreferredPrompt) {
		println("Welcome, " + name + ". The system is readey")
		println(prompt.preference)
	}
		
	def main(args: Array[String]): Unit = {
		import JoesPrefs._
		//implicit val bobsPrompt = new PreferredPrompt("relax> ")
		
		greet("Joe")
	}	
}

如果把object JoesPrefs放到object Greeter之后,就会出错.